| Locality | Post Code |
|---|---|
| Baishi, Pingxi (白石里) | 226001, 226002, 226003 |
| Dongshi, Pingxi (東勢里) | 226002, 226003 |
| Jingtong, Pingxi (菁桐里) | 226002 |
| Lingjiao, Pingxi (嶺腳里) | 226001 |
| Nanshan, Pingxi (南山里) | 226003 |
| Pinghu, Pingxi (平湖里) | 226003 |
| Pingxi, Pingxi (平溪里) | 226001 |
| Shidi, Pingxi (石底里) | 226001 |
| Shifen, Pingxi (十分里) | 226003 |
| Shulang, Pingxi (薯榔里) | 226002 |
| Wanggu, Pingxi (望古里) | 226001, 226003 |
| Xinliao, Pingxi (新寮里) | 226003 |